Answer to Question #73260 in Atomic and Nuclear Physics for Adnan Rafi

Question

How is a nucleus stable even inside proton-proton repelling each other?

Answer 1

Indeed, two protons are repelling each other due to electromagnetic interaction, but protons are also attracting each other due to nuclear strong force, which at the range of 10^(−15) m is approximately 137 times as strong as electromagnetism. That is why nucleus is stable.